Direction: Read the two statements, the assertion (A) and the reason (R), and indicate your answer using the given codes. Assertion (A): Red-green colour blindness occurs with more frequency in…
Question and options
Direction: Read the two statements, the assertion (A) and the reason (R), and indicate your answer using the given codes.
Assertion (A): Red-green colour blindness occurs with more frequency in males than in females.
Reason (R): Females have two X chromosomes and males have one.
Reason (R): Females have two X chromosomes and males have one.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true and R is NOT the correct explanation of A
- A is true but R is false
- R is true but A is false
Answer and explanation
Correct answer: A - Both A and R are true and R is the correct explanation of A
Red-green colour blindness is X-linked recessive: males (XY) with one defective X are affected, females (XX) need two copies. Both true and R explains A.
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